<script lang="ts" setup name="GoodsImage">
import { useMouseInElement } from '@vueuse/core'
import {ref,computed} from 'vue'
const target = ref(null)
const { isOutside, elementX, elementY } = useMouseInElement(target)
defineProps<{
  images:string[]
}>()
const active = ref(0)
const position = computed(() => {
  let x = elementX.value - 100
  let y = elementY.value - 100
  if (x <= 0) x = 0
  if (x >= 200) x = 200
  if (y <= 0) y = 0
  if (y >= 200) y = 200
  return {
    x,
    y,
  }
})
</script>
<template>
  <div class="goods-image">
    <!-- 大图片容器 -->
    <div class="large" :style="[{backgroundImage:`url(${images[active]})`,
    backgroundPosition: `${-position.x * 2}px ${-position.y * 2}px`
    }]"
    v-show="!isOutside"></div>
    <!--  -->
    <div class="middle" ref="target">
      <img
        :src="images[active]"
        alt=""
      />
      <!-- 遮罩层 -->
      <div class="layer" v-show="!isOutside" :style="{ left: position.x + 'px', top: position.y + 'px' }"></div>
    </div>
    <ul class="small">
      <li v-for="(item,index) in images" 
      :key="item" 
      :class="{ active: active === index }"
       @mouseenter="active = index">
        <img
          :src="item"
          alt=""
        />
      </li>
    </ul>
  </div>
</template>

<style scoped lang="less">
.goods-image {
  width: 480px;
  height: 400px;
  position: relative;
  display: flex;
   z-index: 500;
    .large {
      position: absolute;
      top: 0;
      left: 412px;
      width: 400px;
      height: 400px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
      background-repeat: no-repeat;
      background-size: 800px 800px;
      background-color: #f8f8f8;
    }
  .middle {
    width: 400px;
    height: 400px;
    background: #f5f5f5;
    position: relative;
   cursor: move;
   .layer {
     width: 200px;
     height: 200px;
     background: rgba(0,0,0,.2);
     left: 0;
     top: 0;
     position: absolute;
   }
  }
  .small {
    width: 80px;
    li {
      width: 68px;
      height: 68px;
      margin-left: 12px;
      margin-bottom: 15px;
      cursor: pointer;
      &:hover,
      &.active {
        border: 2px solid @xtxColor;
      }
    }
  }
}
</style>
